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<h2>How to use Function Editor.</h2>
Expressions can be written very freely in the spreadsheet. <br>
<br>
Cell references are written with an '#' before the column and row name
i.e. "#A4". Just remember that the root of the expression is where an
comparision operator ('=', '&gt;'or '&lt;') is present. <br>
<br>
Comments should start with an '%'. Comments can also be written with no
special marker if one avoid to use '=', '&gt;'or '&lt;' in the text.<br>
<br>
<h4>Advanced topics:</h4>
<ul>
  <li><a href="TSR.html">Timestep References</a></li>
  <li><a href="Vars.html">Variables</a><br>
  </li>
</ul>
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